[taskcluster 2026-04-06 22:21:53.876Z] Task ID: Ql7Go9Q_RgWZ_HVmFyGkUw
[taskcluster 2026-04-06 22:21:53.876Z] Worker ID: 8981205677657135675
[taskcluster 2026-04-06 22:21:53.876Z] Worker Group: us-east1-d
[taskcluster 2026-04-06 22:21:53.876Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-04-06 22:21:53.876Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-04-06 22:21:53.876Z] Worker Version: 46.1.0
[taskcluster 2026-04-06 22:21:53.876Z] Public IP: 34.138.55.180
[taskcluster 2026-04-06 22:21:53.876Z] Hostname: proj-wpt-ci-z9infv0sqwg80clikjpcwa

[taskcluster 2026-04-06 22:21:54.882Z] === Task Starting ===
+ '[' '' ']'
+ '[' -d /etc/profile.d ']'
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/01-locale-fix.sh ']'
+ . /etc/profile.d/01-locale-fix.sh
+++ /usr/bin/locale-check C.UTF-8
++ eval
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/apps-bin-path.sh ']'
+ . /etc/profile.d/apps-bin-path.sh

...(268 lines hidden)...

Failed to read: session.screen0.fullMaximization
Setting default value
Failed to read: session.screen0.maxIgnoreIncrement
Setting default value
Failed to read: session.screen0.maxDisableMove
Setting default value
Failed to read: session.screen0.maxDisableResize
Setting default value
Failed to read: session.screen0.workspacewarping
Setting default value
Failed to read: session.screen0.showwindowposition
Setting default value
Failed to read: session.screen0.autoRaise
Setting default value
Failed to read: session.screen0.clickRaises
Setting default value
Failed to read: session.screen0.defaultDeco
Setting default value
Failed to read: session.screen0.tab.placement
Setting default value
Failed to read: session.screen0.windowMenu
Setting default value
Failed to read: session.screen0.noFocusWhileTypingDelay
Setting default value
Failed to read: session.screen0.workspaces
Setting default value
Failed to read: session.screen0.edgeSnapThreshold
Setting default value
Failed to read: session.screen0.window.focus.alpha
Setting default value
Failed to read: session.screen0.window.unfocus.alpha
Setting default value
Failed to read: session.screen0.menu.alpha
Setting default value
Failed to read: session.screen0.menuDelay
Setting default value
Failed to read: session.screen0.tab.width
Setting default value
Failed to read: session.screen0.tooltipDelay
Setting default value
Failed to read: session.screen0.allowRemoteActions
Setting default value
Failed to read: session.screen0.clientMenu.usePixmap
Setting default value
Failed to read: session.screen0.tabs.usePixmap
Setting default value
Failed to read: session.screen0.tabs.maxOver
Setting default value
Failed to read: session.screen0.tabs.intitlebar
Setting default value
Failed to read: session.screen0.focusModel
Setting default value
Failed to read: session.screen0.tabFocusModel
Setting default value
Failed to read: session.screen0.focusNewWindows
Setting default value
Failed to read: session.screen0.focusSameHead
Setting default value
Failed to read: session.screen0.rowPlacementDirection
Setting default value
Failed to read: session.screen0.colPlacementDirection
Setting default value
Failed to read: session.screen0.windowPlacement
Setting default value
Failed to read: session.screen0.slit.acceptKdeDockapps
Setting default value
Failed to read: session.screen0.slit.autoHide
Setting default value
Failed to read: session.screen0.slit.maxOver
Setting default value
Failed to read: session.screen0.slit.placement
Setting default value
Failed to read: session.screen0.slit.alpha
Setting default value
Failed to read: session.screen0.slit.onhead
Setting default value
Failed to read: session.screen0.slit.layer
Setting default value
Failed to read: session.screen0.toolbar.autoHide
Setting default value
Failed to read: session.screen0.toolbar.maxOver
Setting default value
Failed to read: session.screen0.toolbar.visible
Setting default value
Failed to read: session.screen0.toolbar.alpha
Setting default value
Failed to read: session.screen0.toolbar.layer
Setting default value
Failed to read: session.screen0.toolbar.onhead
Setting default value
Failed to read: session.screen0.toolbar.placement
Setting default value
Failed to read: session.screen0.toolbar.height
Setting default value
Failed to read: session.screen0.iconbar.mode
Setting default value
Failed to read: session.screen0.iconbar.alignment
Setting default value
Failed to read: session.screen0.iconbar.iconWidth
Setting default value
Failed to read: session.screen0.iconbar.iconTextPadding
Setting default value
Failed to read: session.screen0.iconbar.usePixmap
Setting default value
 0:17.53 INFO Getting profile data from git ref 4cbe9648c5d4c1cf600b7a8c3589e4589541ded5
 0:17.89 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/4cbe9648c5d4c1cf600b7a8c3589e4589541ded5/151.0a1
 0:17.89 INFO Downloading OpenH264 plugin
mem avail: 14713 of 15806 MiB (93.09%), swap free:    0 of    0 MiB ( 0.00%)
 0:22.81 INFO Downloading openh264.json from git ref 4cbe9648c5d4c1cf600b7a8c3589e4589541ded5
 0:22.85 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:23.25 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:23.25 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1319] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:23.31 mozversion INFO application_buildid: 20260406090304
 0:23.31 mozversion INFO application_changeset: 264d49b61bdb9a078bdd4be90996d9f8deccbfc1
 0:23.31 mozversion INFO application_display_name: Firefox Nightly
 0:23.31 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:23.31 mozversion INFO application_name: Firefox
 0:23.31 mozversion INFO application_remotingname: firefox-nightly
 0:23.31 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:23.31 mozversion INFO application_vendor: Mozilla
 0:23.31 mozversion INFO application_version: 151.0a1
 0:23.31 mozversion INFO platform_buildid: 20260406090304
 0:23.31 mozversion INFO platform_changeset: 264d49b61bdb9a078bdd4be90996d9f8deccbfc1
 0:23.31 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:23.31 mozversion INFO platform_version: 151.0a1
 0:28.91 INFO Installed font: Ahem.ttf
 0:29.81 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:29.85 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:29.86 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:29.88 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:29.91 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:29.91 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:29.92 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:29.92 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:29.93 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:29.93 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:29.93 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:29.93 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:29.93 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:29.94 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:29.94 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:30.02 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:30.32 SUITE_START: web-platform-test - running 1 tests
 0:48.62 INFO Using 1 child processes
 0:48.63 INFO Setting up ssl
 0:48.65 certutil Full command: /usr/bin/certutil -N -d /tmp/tmp3757xf1_.mozrunner -f /tmp/tmp3757xf1_.mozrunner/.crtdbpw
certutil b''
 0:48.67 certutil b''
 0:48.68 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 0:48.68 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpqixnii7x
 0:48.69 INFO Starting runner
 0:48.69 pid:1423 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:1423 [1423] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:49.21 pid:1423 1775514315805	Marionette	INFO	Marionette enabled
 0:49.31 pid:1423 1775514315904	Marionette	INFO	Listening on port 46089
Failed to read: session.screen0.titlebar.left
Setting default value
Failed to read: session.screen0.titlebar.right
Setting default value
 0:51.83 pid:1423 console.error: services.settings:
 0:51.83 pid:1423   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 0:51.84 pid:1423   Stack:
 0:51.84 pid:1423     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 0:51.84 pid:1423 list@resource://services-settings/Database.sys.mjs:96:13
 0:52.03 pid:1423 console.warn: BackupService: "There was an error while trying to get the Document's directory" [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIProperties.get]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource:///modules/backup/BackupService.sys.mjs :: get docsDirFolderPath :: line 1229"  data: no]
 0:52.44 TEST_START: /scroll-animations/css/view-timeline-inset-parsing.html
 0:52.99 TEST_END: Test OK. Subtests passed 23/23. Unexpected 0
 0:52.99 INFO No more tests
 0:52.99 pid:1423 1775514319586	Marionette	INFO	Stopped listening on port 46089
 0:53.37 pid:1423 [GFX1-]: VideoBridgeParent receives IPC close with reason=AbnormalShutdown
 0:53.43 INFO Browser exited with return code -15
 0:53.31 INFO Closing logging queue
 0:53.31 INFO queue closed
 0:53.43 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 24 checks (23 subtests, 1 tests)
Expected results: 24
Unexpected results: 0
OK
 0:53.44 INFO Got 0 unexpected results, with 0 unexpected passes
 0:53.44 wptserve INFO Stopped http server on 127.0.0.1:8000
 0:53.44 wptserve INFO Stopped http server on 127.0.0.1:8001
 0:53.44 wptserve INFO Stopped http server on 127.0.0.1:8002
 0:53.44 wptserve INFO Stopped http server on 127.0.0.1:8443
 0:53.44 wptserve INFO Stopped http server on 127.0.0.1:8003
 0:53.46 wptserve INFO Stopped http server on 127.0.0.1:8444
 0:53.46 wptserve INFO Stopped http server on 127.0.0.1:9000
 0:53.46 wptserve INFO Stopped http server on 127.0.0.1:8445
 0:53.47 wptserve INFO Stopped http server on 127.0.0.1:8446
 0:53.47 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:53.84 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:53.84 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:53.89 INFO Removed font: Ahem.ttf
 0:53.92 INFO Closing logging queue
 0:53.92 INFO queue closed
[taskcluster 2026-04-06 22:25:22.431Z] === Task Finished ===
[taskcluster 2026-04-06 22:25:23.534Z] Successful task run with exit code: 0 completed in 209.658 seconds